| 1 | |
| 2 | |
| 3 | #include <linux/kernel.h>
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| 4 | #include <linux/module.h>
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| 5 | #include <linux/init.h>
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| 6 | #include <linux/delay.h>
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| 7 |
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| 8 | void __aligned(8) __delay(unsigned long loops)
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| 9 | {
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| 10 | asm volatile (
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| 11 | "mov r0, r0\n"
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| 12 | "1:declt %0\n"
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| 13 | "bf 1b"
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| 14 | : "=r"(loops)
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| 15 | : "0"(loops));
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| 16 | }
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| 17 | EXPORT_SYMBOL(__delay);
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| 18 |
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| 19 | void __const_udelay(unsigned long xloops)
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| 20 | {
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| 21 | unsigned long long loops;
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| 22 |
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| 23 | loops = (unsigned long long)xloops * loops_per_jiffy * HZ;
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| 24 |
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| 25 | __delay(loops >> 32);
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| 26 | }
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| 27 | EXPORT_SYMBOL(__const_udelay);
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| 28 |
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| 29 | void __udelay(unsigned long usecs)
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| 30 | {
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| 31 | __const_udelay(usecs * 0x10C7UL);
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| 32 | }
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| 33 | EXPORT_SYMBOL(__udelay);
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| 34 |
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| 35 | void __ndelay(unsigned long nsecs)
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| 36 | {
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| 37 | __const_udelay(nsecs * 0x5UL);
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| 38 | }
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| 39 | EXPORT_SYMBOL(__ndelay);
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